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All IMG Rogue GPUs include a reset line that participates in the power-up sequence. On some SoCs (e.g., T-Head TH1520 and Banana Pi BPI-F3), this reset line is exposed and must be driven explicitly to ensure proper initialization. On others, such as the currently supported TI SoC, the reset logic is handled in hardware or firmware without exposing the line directly. In platforms where the reset line is externally accessible, if it is not driven correctly, the GPU may remain in an undefined state, leading to instability or performance issues. This commit adds a dedicated reset controller to the drm/imagination driver. By managing the reset line (where applicable) as part of normal GPU bring-up, the driver ensures reliable initialization across platforms regardless of whether the reset is controlled externally or handled internally. Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> Reviewed-by: Matt Coster <matt.coster@imgtec.com> Link: https://lore.kernel.org/r/20250418-apr_18_reset_img-v6-2-85a06757b698@samsung.com Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.